| mycobacterial arthritis and synovitis in painted reed frogs (hyperolius marmoratus). | several species of atypical mycobacteria have been isolated from wild and captive amphibians. in captive anurans, cutaneous and visceral mycobacteriosis are common and can result in significant mortality, particularly when animals are immunocompromised. mycobacterial arthritis and synovitis are reported rarely in amphibians. we describe 20 cases in painted reed frogs (hyperolius marmoratus), which presented with cachexia, limb paresis or paralysis or 'spindly leg syndrome'. histopathology reveal ... | 2017 | 28233523 |
| existing and emerging high impact invasive species are characterized by higher functional responses than natives. | predicting ecological impacts of invasive species and identifying potentially damaging future invaders are research priorities. since damage by invaders is characterized by their depletion of resources, comparisons of the 'functional response' (fr; resource uptake rate as a function of resource density) of invaders and natives might predict invader impact. we tested this by comparing frs of the ecologically damaging 'world's worst' invasive fish, the largemouth bass (micropterus salmoides), with ... | 2014 | 24522629 |
| afrobatrachian mitochondrial genomes: genome reorganization, gene rearrangement mechanisms, and evolutionary trends of duplicated and rearranged genes. | mitochondrial genomic (mitogenomic) reorganizations are rarely found in closely-related animals, yet drastic reorganizations have been found in the ranoides frogs. the phylogenetic relationships of the three major ranoid taxa (natatanura, microhylidae, and afrobatrachia) have been problematic, and mitogenomic information for afrobatrachians has not been available. several molecular models for mitochondrial (mt) gene rearrangements have been proposed, but observational evidence has been insuffici ... | 2013 | 24053406 |
| monophyly of the species of hepatozoon (adeleorina: hepatozoidae) parasitizing (african) anurans, with the description of three new species from hyperoliid frogs in south africa. | haemogregarines (apicomplexa: adeleiorina) are a diverse group of haemoparasites reported from almost all vertebrate classes. the most commonly recorded haemogregarines to parasitize anurans are species of hepatozoon miller, 1908. to date 16 hepatozoon species have been described from anurans in africa, with only a single species, hepatozoon hyperolli (hoare, 1932), infecting a member of the hyperoliidae. furthermore, only two hepatozoon species are known from south african anurans, namely hepat ... | 2017 | 29198245 |
| regulation of body water balance in reedfrogs (superspecies hyperolius viridiflavus and hyperolius marmoratus: amphibia, anura, hyperoliidae) living in unpredictably varying savannah environments. | the regulation of body water balance was examined in the reedfrogs hyperolius marmoratus taeniatus and hyperolius viridiflavus ommatostictus. temperature and stage of post-metamorphic development significantly affected the rate of water uptake. hydrated reedfrogs prevented hyperhydration by voiding diluted urine when obtaining water. within 48 hr after rehydration, body fluid osmolality remained at low levels, which may be supportive to counter excessive cutaneous water influx in hydrated frogs. ... | 1997 | 9505437 |
| plasticity of thermal tolerance and metabolism but not water loss in an invasive reed frog. | phenotypic plasticity may buffer the selection pressures on organisms that inhabit novel or rapidly-changing environments. we investigated plasticity of thermal tolerance, energetic and water loss traits and their interaction with behaviour in a small-bodied, arboreal anuran (hyperolius marmoratus rapp, hyperoliidae) undergoing rapid range expansion into the winter rainfall region of south africa. after short-term exposure to three temperatures (acclimation treatments) commonly encountered in th ... | 2015 | 26164532 |
| success breeds success in mating male reed frogs (hyperolius marmoratus). | studies of the distribution of mating success among males in frog choruses typically seek to identify specific phenotypic attributes that confer a higher mating success on certain individual males. these attributes invariably relate to competition among males: either direct competition in the form of aggression, or competition to attract and be chosen by females. in this paper, we present evidence that an additional factor may operate in frog choruses. we show that individual males who mate on a ... | 1998 | 9721688 |
| energetics of vocalization in the african reed frog (hyperolius marmoratus). | rates of oxygen consumption and carbon dioxide release were measured in calling and resting painted reed frogs, hyperolius marmoratus. o2 consumption increased linearly with call rate and reached 0.91 ml/g . h at average call rates of 3100 calls/hr. the respiratory quotient (rq = vco2/vo2) was calculated to evaluate which metabolic substrates--lipids or carbohydrates--are utilized. males that were not fed for a week had significantly lower rq's during calling (0.75) than recently fed males (0.89 ... | 1996 | 8759146 |